diff --git a/build-constraints.yaml b/build-constraints.yaml
index 37c819d2..f0960c18 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2669,6 +2669,7 @@ packages:
 
         # https://github.com/fpco/stackage/issues/2100
         - pandoc < 1.19
+        - texmath < 0.9
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of